(normalcdf[x_] := 1/2 Erf[x^2] + 1/2;
?[x_] := D[normalcdf[x1],x1] /. x1 -> x //
?[x]
[ExponentialE]-(x^2/2)/Sqrt(2 ?)
I am using this definition of the Cumulative Normal Function which produces
a nice clean derivative. When I start using complicated functions the 1/2
from the definition makes for messy solutions. Can anyone suggest a better
way to define the cumulative normal distribution? I am only interested in
symbol derivatives of the distribution. Thanks.
Frank